PT-2021-7238 · Siemens+1 · Scalance+2

Published 2021-04-13 · Updated 2022-10-05 · CVE-2021-29998

Positive Technologies (AI Summary)

CVSS v3.1

10

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Wind River VxWorks versions prior to 6.5

Description The issue is related to a possible heap overflow in the DHCP client of Wind River VxWorks. This could allow a remote attacker to execute arbitrary code. The vulnerability is also present in the DHCP client of Siemens SCALANCE and Ruggedcom industrial switches, which are based on Wind River VxWorks.

Recommendations For versions prior to 6.5, update to version 6.5 or later to resolve the issue. As a temporary workaround, consider disabling the DHCP client until a patch is available. Restrict access to the DHCP client to minimize the risk of exploitation.

Fix

Heap Based Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-122

CWE-787

Related Identifiers

BDU:2022-04050

CVE-2021-29998

Affected Products

Ruggedcom

Scalance

Wind River Vxworks

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2021-29998 · Security Note
• https://support2.windriver.com/index.php?page=security-notices · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-29998 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-04050 · Security Note
• https://t.me/cvenotify/17521 · Telegram Post
• https://us-cert.cisa.gov/ics/advisories/icsa-21-194-12 · Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-560465.pdf · Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-910883.pdf · Note